Management of Large Right Renal Mass on CT

Initial Imaging Evaluation

The American Urological Association recommends obtaining high-quality CT or MRI with and without contrast to assess contrast enhancement, exclude angiomyolipoma, evaluate for locally invasive features, define relevant anatomy, and assess the contralateral kidney 3, 4
The European Association of Urology suggests performing chest CT to evaluate for lung metastases or mediastinal lymphadenopathy, as this is the most accurate investigation for staging 5
The American College of Radiology recommends obtaining bone or brain imaging only if symptomatic, as most metastases are symptomatic at diagnosis 5, 6

The American Urological Association recommends considering renal mass biopsy in patients with severe CKD, diabetes, hypertension, or solitary kidney, where preserving renal function is critical 1, 2
The American Urological Association suggests that renal mass biopsy is not required for young, healthy patients unwilling to accept biopsy uncertainties who will proceed with surgery regardless 1, 2

The American Urological Association recommends prioritizing partial nephrectomy in most cases, unless specific contraindications exist 1, 2
The European Association of Urology suggests that partial nephrectomy is strongly indicated when there is an anatomic or functional solitary kidney, bilateral tumors, known familial RCC, or pre-existing CKD or proteinuria 7
The American Urological Association recommends considering radical nephrectomy when there is a potentially aggressive tumor with no pre-existing CKD/proteinuria and a normal contralateral kidney providing new-baseline GFR >45 ml/min/1.73m² 1, 2

The American Urological Association recommends that negative surgical margins are a priority during partial nephrectomy, with the extent of normal parenchyma removed determined by tumor characteristics and growth pattern 7
The European Association of Urology suggests performing lymph node dissection only if clinically concerning regional lymphadenopathy is present on imaging or during surgical exploration, primarily for staging purposes 1, 2

The American Urological Association recommends discussing thermal ablation as a less-invasive option, but counseling regarding increased local tumor recurrence risk compared to surgical excision 8, 3
The European Association of Urology suggests that thermal ablation is more appropriate for high surgical risk patients or those with significant comorbidities 8

The American Urological Association recommends referring patients to nephrology for those with eGFR <45 ml/min/1.73m², confirmed proteinuria, diabetics with pre-existing CKD, or expected postoperative eGFR <30 ml/min/1.73m² 7